docs: def form(value):
      """
      Format numbers in a nice way.
  
      >>> form(0)
      '0'
      >>> form(0.0)
      '0.0'
      >>> form(0.0001)
      '1.000E-04'
      >>> form(1003.4)
      '1,003'
      >>> form(103.4)
      '103'
      >>> form(9.3)
      '9.30000'
      >>> form(-1.2)
      '-1.2'
      """
      if isinstance(value, FLOAT + INT):
          if value <= 0:
              return str(value)
          elif value < .001:
              return '%.3E' % value
          elif value < 10 and isinstance(value, FLOAT):
              return '%.5f' % value
          elif value > 1000:
              return '{:,d}'.format(int(round(value)))
          elif numpy.isnan(value):
              return 'NaN'
          else:  # in the range 10-1000
              return str(int(value))
      elif isinstance(value, bytes):
          return decode(value)
      elif isinstance(value, str):
          return value
      elif isinstance(value, numpy.object_):
          return str(value)
      elif hasattr(value, '__len__') and len(value) > 1:
          return ' '.join(map(form, value))
      return str(value)